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No. 610.234. Patented Sept. 6, I898.

WJE. HEFFNER. STORE SERVICE LADDER,

(Application filed Oct. 8 1897.)

(No Mogiel.)

W/ T NE SSE S litre TATES 1 ICE WILLIAM E. HEFFNER, or CANTON, onIo,Ass:IeNoR TO s. ANNA HEFFNER,

- or SAME PLACE.

STORE-SERVICE LADDER.

SPECIFICATION forming part of Letters Patent No. 610,234, datedSeptember 6, 1898. Application filed October 3,1897, smart. 654,490. (r5model.)

the following is a full, clear, and exact description, reference beinghad to the accompanying drawings, making part of this specification. I

My invention relates to improvements in store-service ladders; and itconsists of certain features of construction and combination of parts bywhich a more simple truck or carrier for the trolley-wheels is provided,which at the same time performs the function of bracing andholdingfirmly the side bars of the ladder, as will be hereinafter morefully described and claimed.

Figure 1 is a perspective view of a storeservice ladder. Fig. 2 is aside View. Fig. 3 is a sectional view'through the trolleywheels. Fig. 4Cis a sectional view of the lower wheel. Fig. 5 is a plan View of theupper trolley-wheel carrier and brace.

In the accompanying drawings similar letters of reference refer tosimilar parts.

A represents the ladder, which may be of any desired shape or form. Ihave shown it composed of two side bars a and a, slightly bent inwardlyat their lower ends and having attached thereto the steps a B representsthe carrier frame and brace, which consists of an inner and an outermemher I) and b, substantially U-shaped in form and bolted together inthe center. The ends are bent at rightangles to the main body and' passaround and are attached to the upper ends of the side bars a a by meansofbolts, which pass through both the outer member of the carrier-frameand the sides of the lad-' der and the inner member of the frame. The

inner member of the frame b, at either end thereof, is bent so as topermit of the insertion of the trolley-wheels b and b which arejournaled between theeinner and the outer members of the carrier-framebymeans of a shaft 11 screw-threaded upon its ends and adapted to beheld in position between the by locking-nuts b and b inner and outermembers of the carrier-frame V The inner or hearing surface of the shaft12 is larger than'the screw-threaded portions which pass throughtheinner and outer members of the carrierframe, and thus provides alarge surface upon which the trolley-Wheels run. The trolleywheels 5 andb? are provided with circumferential grooves 12 adapted to conform inshape to the track 0, which may be made of either wood or steel and isadapted to be attached to'the shelving or casing. The lower wheels D(only one of which is shown) are intended to hold the ladder out fromthe easing and consist of two trolley-wheels, each having acircumferential groove cl, in which there is secured a rubber tire d,and the wheel is mounted between plates or bars d and (1 one of whichpasses over the top of a step and the other under and are'securelybolted to the step. Each trolley-wheel is journaled upon a headed shaft(1 which passes through thesupporting-barsd and (Z The shaft d isscrew-threaded at one end and is held in position by means of aretaining-nut d I-Ieretofore in devices of this character thecarrier-frame has consisted either of a single plate of iron attached tothe under side of a step and carrying the trolley-wheels or of loopssupporting the rod upon which were journaled the ,trolleyfwheels, or thetrolleywheels were mounted upon brackets, and the upper end of theladder, upon which all the strain of moving the ladder andsupporting theweight necessarily falls, was not braced or otherwise supported againstthe strain. My device overcomes all these difficulties, and at the sametime provides a simple, easilyconstructed, easily-repaired, and cheaptrolley-carrier and brace.

Having thus fully described my invention what I desire to claim andsecure by Letters Patent ist.

1. In a store-service ladder, the combination with a ladder, of acarrier-frame consisting of an inner and an outer member securely boltedtogether, the ends thereof bent at right angles to the frame, andadapted to be bolted to the sides of the ladder, and trolley-wheelsjournaled in the frame, substantially as described and for the purposeset forth.

2. A trolley carrier-frame for store-service ladders, consisting of twopieces of strap-iron substantially U -shaped, and bolted together, thefree ends thereof adapted to be bolted to the inner and outer sidesrespectively of the ladder, and trolley-Wheels journaled in the frame,substantially as described and for the purpose set forth.

3. The combination in a trolley-frame for store-service ladders, of twopieces of strap metal bolted together near their centers, and the endsthereof bent at right angles, the ends of the inner member adapted topass between the sides of the ladder, the outer member to embrace thesides of the ladder, bolts passing through the inner and outer membersand the sides of the ladder, and trolley-Wheels journaled in the frame,substantially as described and for the purpose set forth.

4. The combination in a store-service ladder, of a trolley-frameconsisting of an inner Witnesses:

OHAs. R. MILLER, CHAS. M. BALL.

